40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Tue Feb 16 14:56:44 2021, gautam, Update, SUS, aLIGO Sat Amp installed, powered MC1_deadUL.pngIMG_9100.jpg
    Reply  Wed Feb 17 16:11:53 2021, gautam, Update, SUS, aLIGO Sat Amp installed, powered 
       Reply  Thu Feb 18 15:33:21 2021, gautam, Update, SUS, aLIGO Sat Amp installed, powered and commissioned 
          Reply  Thu Feb 18 18:05:04 2021, gautam, Update, SUS, aLIGO Sat Amp characterization OSEMnoise.pdfLEDdriveNoise.pdf
             Reply  Thu Feb 18 20:20:25 2021, Koji, Update, SUS, aLIGO Sat Amp characterization 
Message ID: 15819     Entry time: Thu Feb 18 20:20:25 2021     In reply to: 15818
Author: Koji 
Type: Update 
Category: SUS 
Subject: aLIGO Sat Amp characterization 

Yeah, it's really inconsistent. You had 35mA LED drive and the current noise of the noisy channel was 5e-7 A/rtHz at 1Hz. The RIN is 1.4e-5 /rtHz. The approx. received photocurrent is 30uA as we discussed today and this should make the noise around 4e-10 A/rtHz at 1Hz. However, the readout noise level is better than this level. (well below 1e-10 A/rtHz)

BTW, the IMC seemed continuously locked for 5 hours. Good sign.

ELOG V3.1.3-